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Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : A novel cross-layer mesh router placement scheme for wireless mesh networks | Chung et al. EURASIP Journal on Wireless Communications and Networking 2011 2011 134 EURASIP Journal on . http jwcn.eurasipjournals.eom content 2011 1 134 Wireless Communications and Networking a SpringerOpen Journal RESEARCH Open Access A novel cross-layer mesh router placement scheme for wireless mesh networks Tein-Yaw Chung 1 Hao-Chieh Chang1 and Hsiao-Chih George Lee2 Abstract Wireless mesh networks WMNs offer a great promise in supporting ubiquitous multimedia Internet access for mobile or fixed mesh clients MCs . In WMNs Internet traffic from MCs is aggregated by serving mesh router MR and forwarded hop-by-hop by MRs to an internet gateway IGW or vice versa. While deploying MRs and IGWs intricate relationships among antenna types wireless links with adaptive modulation and coding MAC scheduling routing and equipment cost render the network planning an extremely complex problem. This article presents a novel cross-layer MR placement CMRP scheme that can cope up with this issue. CMRP encapsulates the crosslayer metrics into three underlying attributes Local Coverage LC Backbone Residual Capacity BRC and Deployment Cost DC and are used to minimize the network deployment cost. Coupled with our proposed novel tree-based minimal cost routing scheme and weight-based link assignment for user coverage we are able to plan the design of WMNs efficiently. Extensive simulations have been performed to examine the performance and feasibility of CMRP and compared with existing design schemes based on coverage connectivity and combination of the two. The result demonstrates that our approach outperforms existing schemes both in the cost performance ratio and potential implementation feasibility. Keywords capacity improvement gateway placement multi-hop relay networks relay node placement wireless mesh networks wireless multi-hop networks 1 Introduction In the near future broadband wireless mesh networks WMNs 1 2 are expected to be widely deployed for providing Internet .